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System error 1219: multiple connections by the same user

System error 1219: Multiple connections to a server or shared resource by the same user, using more than one user name, are not allowed. Disconnect all previous connections to the server or shared resource and try again.

What it means

Section titled “What it means”

Error 1219 is ERROR_SESSION_CREDENTIAL_CONFLICT. Windows already has a connection to that server under one user name. You tried to connect again with a different user name. Windows does not allow that.

Why it happens

Section titled “Why it happens”
  • You opened the shared folder before with one account (for example your own), and now you use another account for the same PC.
  • A mapped drive to that server is still connected with old credentials.
  • You changed the password or account on the other PC, but your PC still holds the old connection.

How Devpit fixes or avoids it

Section titled “How Devpit fixes or avoids it”

When you copy with Share Files and Windows answers with error 1219, Devpit shows “Already signed in to that PC as someone else”. Press d to close the old connections to that one PC, and Devpit tries again. It does not touch connections to other PCs.

Share Files also creates a temporary login just for the share, with its own user name, so your own Windows password is never used. If your PC already has an older connection to the same PC under a different name, Windows can still show 1219. Press d in Devpit, or disconnect the old one with the steps below, then connect again.

The manual fix

Section titled “The manual fix”
  1. Close any File Explorer window that shows the share.
  2. Disconnect all connections to shared resources on your PC. Open Command Prompt and run:
net use * /delete

This disconnects active or remembered shared resources on the local computer. It does not delete any files. To see other options, such as removing only one connection, run net help use.

  1. Open the share again, for example \\192.168.1.20\share in the File Explorer address bar, and sign in with the user name and password of the share. Use your own IP address and share name.
  2. If the sign in fails with “The user name or password is incorrect”, see system error 1326.

Sources

Section titled “Sources”

Common questions

Will net use * /delete remove my files?

No. It only disconnects network connections and mapped drives on your PC. Files on the other computer are not touched. Microsoft describes it as a command to disconnect active or remembered shared resources on a local computer.

Why does Windows allow only one user name per server?

Microsoft's error text says multiple connections to a server or shared resource by the same user, using more than one user name, are not allowed. You must disconnect the old connection first, then connect again.